I’m going to change this bug report, because after fiddling about I don’t think its related to any multi‐byte/unicode character issues, its caused by Steam picking the font for the whole length of the line. If I start with a character thats not in the default font Steam is shipped with, it will use that fallback font for the remainder of the line.It would be great if Steam integrated with the installed system fonts, and just use them as fallback character *inline* with the font that Steam uses for chat.